Many people may think Leonard Nimoy's career started with Star Trek. But he was a serious actor for a number of years before that.  He even appearing in other science fiction shows.

But of course it was Star Trek that propelled him not just to fame but to Iconic status. His portrayal of a half-human, half-Vulcan Spock practically launch a cottage industry.

In 1975, Nimoy wrote a book called I Am Not Spock.  Fast forward 20 years to 1995 when I interviewed him for another book he written, called I Am Spock.  

And as you'll hear, there's a reason for his change of heart.